also- i've got a tagboard layout that i'll post when i get it verified. ;]
here are the schematics from Gus's rite fuzz and the mosrite Fuzzrite for reference. if the owners have a problem with my posting them here, i will gladly take them down.
also, i was asked on FSB to describe the added tone control. i tried to explain it to the best of my ability. if anyone has anything to add, please, feel free.
the fuzz control on the fuzzrite works by adding the output of the first stage, an out of phase signal, with the output of the second stage, in phase signal. this is what produces some of the thin, hollowed out, phase cancelled sounds that the fuzzrite is known for. the shape control takes the non-inverted output of the first stage, with the output of the second stage, which also gets mixed in with the output of the first stage with the fuzz control. the shape control has a low pass filter due to the .01 cap to ground, so when when it's negative feedback takes place, it only cancels out the lower frequencies and leaves the highs. with this control you are still able to get the brite, zippy sounds of the original fuzzrite, but are now also able to get the thicker sounds of gus's ritefuzz- all through the same negative feedback techniques similar to what was used in the original fuzzrite!